Brake-cylinder device



ocp 4, 1927.

, 1,644,570 0. c. FARMER vBRAKE CYLINDER DEVICE Filed Dec. 21. 1926 INVENTOR CLYDE C. FARM ER ATTORNEY Patented Oct. 4, 1927.

* UNITED CLYDE c. FARMER,'OF PITTSBURGH, PENNSYLVANIA; A'ssrcNon trofrHEgtvns'rr a HoUsE AIR BRAKE COMPANY, O ILMERDING, PENNSYLVANIA, A. oonronA'rroN or PENNSYLVANIA.

BRAKE-CYLINDER DEVICE.

A ncaaon' ifiledbecember 21,1926. seiner-No, 156,137.

Fig. 3 an enlarged section on the line 3.3 of

Fig. 1; Figz l'an enlarged face View of the assembled deflector rings Fig. 5 an enlarged l5 face view of the deflector cover vplate;

V 6 a section on the line 6-6 of Fig. 5; Fig. 7 a section on the line 7,7 of Fig.4; Fig. 8 a face View of the spring compression plate; Fig. 9 a side view of a portion of'the compression plate; Fig. 10 a face view of one of the deflector rings; and Fig. 11 a side view of a portion of the ring shown in Fig. 10.

. As shown in Fig. 1, a non-pressure head 1 is secured to the usual brake cylinder 2, a gasket 3 being interposed between the meet- I ing faces of the non-pressure head and the brake cylinder body 2 and extending loosely through an openingat the outer endot'the head 1 is, the usual hollow brake cylinder PiStOnrQd L." v

In order't'o prevent the entrance of foreign matter from the atmosphere into the chamher at the non-pressure end of the brake cylinder, three or more deflector rings are provided, such as the rings 5,, 6, and '7. These rings have a slightly greater inside diameter than the diameter of the piston rod 4', so as to ensure free movement oifth'e rod within the rings, and especially since the rod 4 is made of commercial pipe and is consequently more or less rough and uneven and liable to vary somewhat in diameter.

The deflector rings 5, 6, and 7 are provided with tangs 8, 9, and 10 respectively, each tang'being bent into the for-moor a hook, and

the center line of eachhook is such that vided With offset sections, at Which the hooks engage, so that the rings 5, 6, and 7 are held v in position on the ring 11 by the offsets.

I 'When in position'jon thelpiston radiate deflector ring 5. engages the end face of the head 1 and engagingthe exposed face of the v deflector ring 7 is a spring compression ring 12 having a pluralityof spr ng clip sections 1 Which are cut irom the material, ot-the r ng anda're bent "outwardly, as shown in Fig. 9, so as to act as springs engaging the deflector ring 7;. The deflector rings andthe compression ring are held in placeby cover 7 plate 14, adapted to "be secured to'the end of the non-pressure head by bolts andhav mg a flange ,16 for engagingsaid head, the 1 flange providinga space for theidefiector I rmg assembly and saldfiange being prefer;

ably cut away atthe lower portion, as shown at 17 to permit Water or dirt, which may collect at the deflector rings, to fall out.

The parts are 'pr'eferablyassembled by slipping the assembled deflector rings oover the end of the. piston "rod 4 and moving the rings, so that [the ring .51 engages the outer" end of the non-pressure head," The compression ring l2 is then slipped, overthe rod i sothat the s ringclips 13' engagethe outer face ofthe ,de ector'ring 171 Thecover plate 14 is then placed inposition and is securedto the non-pressurefhead 1 by bolts 15 the arrangement being such that'th'e springclips 13 are under compression and thus yielding- 1y press the deflector plates into'engagement;

The expanding spring ring 11 acts" oil-the deflector plates 5, 6, and 7 solas to cause each ring to engage'the piston rod 1 at afpoint diametrically opposite to theflugs] inthe 7 ring, and since-the clearance 'space b-etween the 'pistonrod and the deflector rings is small, after a slightam'o'un't of Wear on the rings, each ring will engage the piston rod through a considerable part of the circume ference, at least greater than one-third of the circumference, and as a consequence, a tight joint is effected bythe combined action of the three rings throughout the circumference, while the face engagement of the'superimposed deflector rings will prevent leakage of air at the arcs of circumference Where the rings are not in engagement with the piston rod.

As the rings Wear, the springring 11 op- 'erates to maintain the engaging portions of the rings in yielding engagement with the piston rod.

With leakage of air prevented around th 1,

an ad ifilim' and butf b the chamber within;the nongpressure 'head,git is necs'sary o to. provide means fon permittin'gthe inhaling I aand eXhaling-of-air wjithin the non-pressureohambervcontaining'a body tcnrled =hair the innerjQplatejQO'being held in: place by 21' "eglitfspring rmg 21;" The cnrledhair' 'alloyvs assage" of Ifore'ign{material-" from the Fat- 1 mos'phere tofjsaidd-nteriorgi 1 V '1 I While prejeri to employ three deflector A HaVing no'wf described my invention, what l flaimn f 'Ii w desire t'oisecnre Leti 5 legtending',thro ghliain s e lin in Said head.

id ma adjaoent to 'said0pening; and? means with-said 'pistonjrodiatsp'aeedpoints. coinbination wit iafbrake cylinder piston 6d; ar a plum-my of'fdefiect o f rings mou'ntedfoii slaid rod," and means for press zisam sim i M si po n s-f pistonirodg a; plurality of deflector rings md nte' a d ar d, a m a s tf r=p e smg "aid ring'sfinto' engagement with said: rod

"a ly"-sp bed ps k gagin f' fdf r n nd? YiBI in IY Pr ss ;.i1saidjrmgsi h fl m n w t dl zsPBedPQiHtsrw-fi ad, due wi hqtq and r reim v m the brak lsy ili erp nz" m1; is P 0 the non pressure, head"; 1sv provided Wit an If-outlet nozzle 18, "which is provided with a.

i 19; .heldkin pla'oe by anorama plates 20, J

:th" n mpassur h a ;b prevents h iai' ise r': i e e ib e f The 'onibinatiolii-with rionressure {ihead pfa.nmercynnaer anda'piston rod' of fal plnralityfioffdeflector rings mounted on v pressing i 'saidf frings into engagement nga' ement with said-rod 3,5Th'e'j eombinatio with 'aj iisk cg linde'r 4 Theeo nbinationiwith brake cylinder piston red; o p ra tyisof ide e r ri men tedqn' i 9d,7an p ng ri .9114

I lliil at e'ral engag m nt and rnonnted on f said rod, and yielding means en gaging said rings v r points.

I q 6.- The combination with; {lib-rake cylinder p ston r d, of a plur lity, of: e or ir ng mou nted' o'n said rod and} having outwardly 'extended'port10ns, and a split spring ring engaging said portions to thereby press p ed p in s 4 a w 7 7 ',Tl1e combination a brake cylinder p ston rod, of three fl'aterally engaging depress said rings into engagementwith said rod at'substanti'ally equally spaced points.-

8..lhe combination with a brake cylinder, p ston rod, of a'p'lnr'ality of'defleetor rings I mounted on said rod, aspring ring'for pressat spaoed points, and me'ans for yieldingly pressing said rings llltOfliltel'fll engagement.

' 9. The con' bin'ati'on with la non-pressure a 7.5

head of a bralre cylinder} and, a'pist'on rod extending 'throngh an opening in said; head,

ing said rings, into engagement with said rod said rings into' 'enga'gement with saidrod at i of a plurality OfSilPliIDPOSGCl rings mounts;

ed on jsaidrod and engaging theend portion of saidfhead, means for yieldingly pressing said rings transversely against said rodfand tionof said ,head,"'rneans for yieldin'gly pressing said rings transversely against said rod, 'yielding means engaging said rings, and a cover plate'secured to said head for hold ing sai'cl yieldingrneans in engageinent with v saidjrings. 5,11 The feoinbination "with a .'-brakejcylinder v In testimony whereof I have. herennto set 10. The; combination 'Withi'a non-pressure 1 i head'otfa brake cylinder'anda piston rod. v

extending throughj'an' opening in said J head, of'a plurality of superimposed rings inonnt eld onsaid rod and engaging. the send" por- I r means f e s y g s id rings in. a i 'i l fi g geinent; 

